Simple-Compound interest

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A sum of money becomes 27/24 of itself in 1/6 years at a certain rate of simple interest. The rate of interest per annum is.....
25%
no
70%
no
50%
no
75%
yes
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 Find the total compound interest on Rs 4800 for 4 years, if rate of interest is 6% for first year, 8% for second year, 10% for third year and 12% for last year.
Rs 1989.80
no
Rs 1969.88
yes
Rs 1979.76
no
Rs 1900.72
no
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The price of a furniture is Rs 8500. If the increment per year is 15% of the price at the begining of each year, then the price of furniture after 2 year will be........
Rs 11341
no
Rs 11241.25
yes
Rs 10241.25
no
Rs 13000.25
no
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Water is filled in a container in such a manner that its volume doubles after every five minutes. If it takes 30 minutes for the container to be full, in how much time will it be one-fourth full?
7 minutes and 30 seconds
no
10 minutes
no
20 minutes
yes
25 minutes
no
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The simple interest accrued on a certain amount for three years is same as the compound interest accrued on the same amount for two years. What is the rate of interest per annum?
50%
no
100%
yes
200%
no
300%
no
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The interest between the simple interest received from two banks on Rs 500 for two years is Rs 2.50. What is the difference between their rates?
0.25%
yes
0.5%
no
1%
no
2.5%
no
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